user.resolver.ts

import { Arg, Ctx, Mutation, Resolver } from 'type-graphql';
import { User } from './user.model';
import { UserService } from './user.service';

@Resolver(_of => User)

export class UserResolver {
  private __userService: UserService;

  constructor() {
    this.__userService = new UserService();    
  }

  @Mutation(_returns => User)
  async createUser(@Arg('data', type => UserCreateInput) data: UserCreateInput, @Ctx() ctx: any) {
   return this.__userService.create(data)
  }
}